Will an exhaust leak cause noticeable performance decreases? I noticed a sound difference and the bike started running like crap. When I was cleaning the bike I noticed some oily build up on the frame. The leak is not at the gasket but on a weld. The exhaust is a custom fabricated kx60 exhaust. My suspicions were confirmed today when riding. I put my hand where I thought the leak was and sure enough...I could feel exhaust blowing out....
